Automatic feeding-regulator for steam-boilers.



' PATENTE-JUNE 9, 1903 H. LADISLAW an L. SGAL. f

AUJOMATIG FEEDING REGULATOR FOR STEAM BOILERS.

' PPLIUATION num Dnc. 11, 1900.

N0 IODEL.

UNITED STATE-s ratented'rune 9,1903.

PATENT *Ormea HEINRICH LADISLAWVAND LUDWIG SGAL, OF VIENNA, AUSTRIA-HUNGARY.

AUTOMATIC FEEDlNG-REGULATOR FOR STEAM-BOILERS.

sPECIFIcATIoN forming par: of Lettere Patent No. 730,465, dated June 9,1903.

Application iiled December 17, 1900, Serial No. 40.161. (No model.)

To all whom t may concern:

Be it known that we, HEINRICH LADISLA and LUDWIG SGAL, subjects oftheEmperor of Austria-Hungary, residing at Vienna, in the Province of LowerAustria, in theEm pire of Austria-Hungary, have invented certain new yand useful Improvements in Automatic Feeding-Regulators forSteam-Boilers; and we do hereby declare the following to be a full,clear, and exact description of theinvention, such as willenable othersskilled in the art'to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters ofreference marked thereon, which form a part of this specification.

This invention has relation to automatic boiler feed-regulators; and itsobject resides in simplifying the construction, and thereby increasingtheir stability and efliciency, as will now be fully described,reference being had tothe accompanying drawings,in which- Figure l is atransverse section ofthe regulater, showing its connection with aboiler; and Fig. 2 is a longitudinal sectional View thereof.

The regulator consists, essentially', of a horizontal cylinder c, inwhich Worksa piston P, connectible with or secured to the plungerrod rof a feed-Water pump of any desired construction, (not shown,) saidcylinder being connected to the boiler at dilferentlevels. To this endthe cylinder has two branches Z7 b', leading from its lowest point aboutmidway of its length or midway ot the stroke of the piston. The branch bis connected to the boiler B Iby a pipe p on a line with the normallevel I', of the water in said boiler, and the branch b' is connected tosaid boiler by a pipe j o at a point below said normal waterlevel. v Y

The operation is as follows: As long as the water-level is normal orslightly above normal the cylinder c will be full of -boiler-wa ter,

' forced into the same by steam -pressure through pipes pp', therebyantagonizing the movements of the piston P and therethrough the'movements of the pump-plunger, the stroke of which is shortened or itsmovement completely stopped, thereby reducing or stop' ping the supplyofWater to the boiler. When, on the contrary, the level of the water inthe boiler B falls below the normal level l, steam is free to dow to thecylinder through pipe p, driving the water into the boiler through pipep' and filling the cylinder, thereby balancing the pressure on oppositepiston-faces and enabling the piston to Work at full stroke, whichcorresponds to the full capacity of the pump, thereby supplying 'watertothe boiler until the normal levelZ has again been reached, when wat-erwill again be forced into the cylinder c and the stroke of the piston Preduced or its movement stopped.

- In order that the described operation of the regulator may take place,the piston P Ashould necessarily be of such adiameter rela- Vof smallerdiameter than the internal diameter of said cylinder has the advantageof a.

saving of labor in that the work of truing the contacting surfaces ofthe piston and cylinder to cause them to work fluid-tight or the packingof the piston are avoided. Inasmuch as it is not necessary that thepiston should work Huid-tight in the cylinder, we may employ a pistonthat works substantially duid-tight therein, or, in otherwords, a pistonof such diameter 'as to leave practically little or no clearance betweenit and the cylinder, and yet dispense with the labor of truing thecontacting surfaces or of packing the piston. In this case means are,however, necessary whereby the distribution of duid toopposite sides otthe piston is eected as rapidly as possible. This we accomplish byforming-in the cylinder-Walls, midway ofV its ends lor at thehalt-stroke point, an annular chamber c' of greater diameter andcross-sectional area than the diameter and peripheral cross-sectionalarea of the piston P. With this construction and supposing the piston Pto be on the right-hand side of said annular chamber,

Fig. `2, at the time steam flows through pipe- IOO p into said chamberthe water on the left of the piston will be driven into the boiler bythe pressure ofthe steam through pipep', and as soon as piston I" hasmoved to the lefthand side of the chamber c steam will also be admittedto the right of the piston and water from that side of the cylinderdriven into the boiler by the pressure of the steam. The pressure of thelatter ou opposite faces being now balanced, the pump can Work at fullstroke. ThesarneoperationWouldtakeplace if the piston were on theleft-hand side of chamber o at the time when steam is admitted to saidcylinder. Like operations also take place in respect of the admission ofWater to the cylinderc when the level of the water in the boiler hasrisen to or slightly above the normal Water-level Z Whether the pistonis on one or the other side ofthe annular chamber c'. lf, on thecontrary, the piston is at half-stroke and in line with chamber c', asshown in Fig. 2, at the time steam or Water is admitted to the cylindersuch fluid will then flow to opposite sides of the piston at the sametime. This chamber o' is, however, also of advantage with a piston ofless diameter than the internal diameter of its cylinderin that thefluid admitted is more rapidly distributed to either side of the piston,as will be readily understood.

Having thus described our invention, what we claim as new therein, anddesire to secure by Letters Patent, is-

l. An automatic boiler-feed regulator comprising a horizontal cylinder,means for connecting the same at a point intermediate of its ends to aboiler at a point in line with the normal level of the water therein andat a point below said level respectively, a piston in said cylinderconnectible to the plunger of a feed-water pump, and means admittingsteam or water to either side of said piston according as the level ofthe water in the boiler falls below or rises to or above its normallevel, substantially as set forth.

2. An automatic boiler-feed regulator comprising a horizontal cylinder,means for connecting the same at its lowest point and intermediate itsends, to a boiler at a point in line with the normal level of the Waterin said boiler andat a point below said level respectively, a piston insaid cylinder connectible to the plunger of a feed-water pump, and meansadmitting boiler-steam or boiler-Water to eithe'r side of said pistonaccording as the level of the water in the boiler falls below or risesto or above its normal level, substantially as set forth.

3. An automatic boiler-feed regulator comprising a horizontal cylinder,its piston adapted to control the movements of a pump-plunger, saidcylinder provided intermediate its ends with an annular chamber ofgreater diameter and cross-sectional area than the diameter andperipheral cross-section of said piston, and means for connecting saidchamber at its lowest point to a boiler at a point in line with thenormal water-level therein and at a point below said level, for thepurpose set forth. p

In testimony that We claim the foregoing as our invention we have signedour names in presence of two subscribing Witnesses.

HEINRICH LADISLAV.

LUDWIG SGAL. lVitnesses:

JOSEF RBRESCH, ALvEsTo S. HoGUE.

